Title:
RESPIRATOR
United States Patent 3504670


Inventors:
Hoel, Orville Alf
Application Number:
US3504670DA
Publication Date:
04/07/1970
Filing Date:
11/13/1967
Assignee:
Air, Reduction
Primary Class:
Other Classes:
128/204.19, 128/205.24
International Classes:
A61M16/00; (IPC1-7): A62B7/02
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